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Poly(3-hydroxyalkanoate) resin composition

Active Publication Date: 2014-08-21
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a poly(3-hydroxyalkanoate) resin composition that includes a specific metal salt of a phenylphosphonic acid compound as a crystal nucleating agent. This results in improved crystallization promotion of the resin, making it more heat-resistant and easier to mold. The resin can be used alone or in combination with other resins such as biodegradable resins, synthetic resins, or engineering plastics. The monomers used to make the resin can be any of the 3-hydroxyalkanoate monomers or 4-hydroxyalkanoate monomers. The composition is particularly useful for making poly(3-hydroxybutyrate)-based resin.

Problems solved by technology

However, it is pointed out that because P3HA has a low crystallization rate, it takes time to solidify P3HA from the molten state during a molding process, which decreases productivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

synthesis example 1

Synthesis of Magnesium Phenylphosphonate (PPA-Mg)

[0064]Into a reaction vessel equipped with a stirrer were charged 10.2 g (50 mmol) of magnesium chloride hexahydrate (manufactured by Wako Pure Chemical Industries, Ltd.) and 100 g of water, and the mixture was stirred to obtain a uniform solution. Next, to this solution being stirred at room temperature (about 25° C.), a solution in which 7.8 g (50 mmol) of PPA and 4.2 g (105 mmol) of sodium hydroxide had been dissolved in 68 g of water was added, and the resultant solution was stirred for additional 1 hour. The produced solid was filtered by vacuum filtration and was washed with water. The resultant wet product was dried at 200° C. for 6 hours to obtain target magnesium phenylphosphonate as white powder.

synthesis example 2

Synthesis of Calcium Phenylphosphonate (PPA-Ca) (1)

[0065]Operating in the same manner as in Synthesis Example 1 except that 7.4 g (50 mmol) of calcium chloride dihydrate (manufactured by Wako Pure Chemical Industries, Ltd.) was used in place of magnesium chloride hexahydrate, target calcium phenylphosphonate (1) was obtained as white powder.

[0066]A scanning electron microscope (SEM) [JSM-7400F manufactured by JEOL Ltd.] image of the resultant powder was observed. Particles of the powder were strip-shaped, and the average of the approximately maximum minor axis (where the size of the strip-shaped particle is represented by , and these figures satisfy ) of 50 particles extracted at random was about 1 μm.

synthesis example 3

Synthesis of Manganese Phenylphosphonate (PPA-Mn)

[0067]Operating in the same manner as in Synthesis Example 1 except that 9.9 g (50 mmol) of manganese chloride tetrahydrate (manufactured by Wako Pure Chemical Industries, Ltd.) was used in place of magnesium chloride hexahydrate, target manganese phenylphosphonate was obtained as pale pink powder.

[0068]The resultant manganese phenylphosphonate, which was an anhydride immediately after being dried, changed to a monohydrate in an air atmosphere at room temperature (about 25° C.).

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Abstract

There is provided a P3HA resin composition to which a crystal nucleating agent suitable for the promotion of the crystallization of a P3HA resin is added. A poly(3-hydroxyalkanoate) resin composition comprising: a poly(3-hydroxyalkanoate) resin; and a metal salt of a phenylphosphonic acid compound of Formula [1]:(where R1 and R2 are each independently a hydrogen atom, a C1-10 alkyl group, or a C2-11 alkoxycarbonyl group), wherein the metal salt is at least one selected from the group consisting of a lithium salt, a sodium salt, a potassium salt, a magnesium salt, a calcium salt, a barium salt, a manganese salt, an iron salt, a cobalt salt, a nickel salt, a copper salt, a silver salt, an aluminum salt, and a tin salt.

Description

TECHNICAL FIELD[0001]The present invention relates to a poly(3-hydroxyalkanoate) resin composition, and in more detail, relates to a resin composition containing a poly(3-hydroxyalkanoate) resin and a metal salt of a phenylphosphonic acid compound.BACKGROUND ART[0002]From the viewpoint of protecting natural environments, researches are vigorously conducted on aliphatic polyesters that can biologically decompose in the natural environment. Among these, a poly(3-hydroxyalkanoate) (hereinafter also called P3HA) resin is known as a polymer produced by microorganisms and is attracting attention because of having excellent biodegradability. In recent years, the resin is desired to be used for a long term as, not only simply having biodegradability, a carbon fixation material that reduces carbon dioxide in the atmosphere. However, it is pointed out that because P3HA has a low crystallization rate, it takes time to solidify P3HA from the molten state during a molding process, which decrease...

Claims

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Application Information

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IPC IPC(8): C08K5/53
CPCC08K5/53C08K5/5317C08L101/16C08L67/04
Inventor SUWA, TAKESHIODAKA, KAZUTOSHIHAYASHI, HISATOOZAWA, MASAAKI
Owner NISSAN CHEM IND LTD
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